Sustainable farming -
Healthy food - A living countryside


CLM designs systems for assessing, monitoring and reporting sustainable food production. Over the years we have developed several practical tools that help farmers and food chain partners gain insight into sustainability performance at farm level.

  1. Gaia Biodiversity Yardstick
    Gaia is a unique internet tool for quantifying on-farm biodiversity. It gives farmers and food companies insight into protecting and enhancing biodiversity. The tool indicates the expected effects of activities on biodiversity on and around the farm. The results are expressed in a spider web diagram, bar charts and tables.
  2. Environmental Indicator for Pesticides
    The Environmental Indicator for Pesticides, in use since 1999, provides farmers and advisors with the information they need to reduce the environmental impact of pesticide use.
  3. The Climate Yardstick
    The Climate Yardstick is an online interactive tool that helps dairy, pig and arable farmers to understand and estimate the greenhouse gas emissions from their farms. The yardstick is in use in the Netherlands and in Denmark and is under development for the USA.
  4. BioESoil
    BioESoil, developed jointly with AlterraWageningenUniversity, assesses the impacts of bio-energy production on soil quality. It looks at nutrient balance and effects on soil organic matter. It can help bio-energy producers, consultants and certifying bodies to determine the impact of biomass and biofuel production on soil fertility.
    More information about BioESoil...
    Direct to the BioESoil tool on
  5. The Ammonia Yardstick
    The Ammonia Yardstick is a tool for estimating and reducing ammonia emissions from dairy farms. It is used by regional governments when preparing spatial planning policies and drawing up environmental permits for farmers.
  6. Dairy Environmental Sustainability Tool
    The Dairy Environmental Sustainability Tool, used in Ben & Jerry’s Caring Dairy programme, is an integrated assessment tool covering nitrate, phosphate, greenhouse gases, ammonia, land use and biodiversity.
  7. >The Climate Scale
    The Climate Scale is an interactive online awareness raising tool that helps Dutch consumers understand the climate impact of food. It is available on the websites of the National Nutrition Centre:
    and (both in Dutch)
  8. Cool Farm Tool
    The Cool Farm Tool is the first international user friendly online carbon calculator for farmers (quite similar to CLM’s Climate Yardstick, though that is in use in NL and DK only). The CFT is owned by the Cool Farm Institute. CLM has helped develop the online version.
    More information about the Cool Farm Tool (CFT)...
    Direct to the Cool Farm Tool on
  9. Environmental data
    CLM owns a large database on the environmental impacts of 550 food products. It contains data on average emissions of greenhouse gases, land use, water use and eutrophication for fresh, cooked, frozen and tinned animal products, vegetables and fruit.